As Mark sits up in his cot…

…and stands outside his full-height wall tent…he wonders what that sound is!

Yes! Quickly! Grab your six-D-cell Maglight! The one that doesn’t add much weight to your pack! Because that wouldn’t scare anything off!!

It’s a rock! Ha! Mark, you dummy. You really had yourself going, didn’t you? At least you can keep this to yourself, should you choose to…